松嫩平原大安灌区渠系地下水临界深度的确定

The critical depth of groundwater determined in canals of Songnen plain irrigation district

松嫩平原土壤盐碱化地下水临界深度,一直是一个焦点性科学问题,学者们存在不同认识,也是实践中的难题。为了完成大安灌区的设计,我们对该问题进行了分析,厘清了不同临界深度概念间的含义差别,确定了合理的灌区地下水临界值和排渍深度值,并应用于大安灌区的设计中,取得良好效果。

The critical depth of groundwater in the soil salinization of Songnen plain has been a focus of scientific questions, there are different understanding of scholars as well as practice problems. In order to complete the design in Da-an irrigation area, we analyzed the problems, clarify the difference among the concept of critical depth, to determine a reasonable critical depth of groundwater and drainage depth in irrigation area, and applied it to the design of Da-an irrigation district and achieved a good results.